General: 1.1 Purpose Scope JLS-6,10-phase oil-immersed outdoor high-voltage power metering box (hereinafter referred to as metering box) constant voltage is 10kV, rated frequency of 50-60Hz for power measurement with the three-phase AC network, transformer and the meter box by a combination of two parts. 1.1.2 JLS-6,10-type metering box for the following situations energy measurement: a variety of enterprises a, irrigation and drainage stations in rural areas, township enterprises, processing plants, small and medium factories, mines, transportation, public institutions as well as forestry, infrastructure Energy Metering site temporarily set up power station high-voltage transmission lines. b, a small power plant or small power plant generating capacity measurement grid with the national power network metering and sending the runtime. 2, the use of environmental conditions: 2.1 Altitude less than 1000m; 2.2 ambient temperature: up to + 40 ℃; daily average of less than 30 ℃; minimum -25 ℃; 2.3 system grounding: neutral non-effectively grounded system; 2.4 atmospheric conditions: No heavy pollution in the atmosphere. 3. Product Overview 3.1 Product main structure by a combination of transformers and the metering meter box composition, combined transformer consists of two voltage transformers and two current transformers are assembled together. Metering box with D86 series three-phase meter and safety device, with a one-way metering Power Meter and a reactive power meter, two-way metering with two blocks and two Reactive Power Meter meter. 3.2 voltage transformer iron outer core type, with high-quality cold-rolled oriented silicon steel is piled up in the columns of the multi-step shape, in a column equipped with primary and secondary coils. 3.3 current transformer core is iron style, with high-quality cold-rolled oriented silicon steel is piled up in the legs of containing primary and secondary coils. 3.4 porcelain jacket by conductive bars for the primary extraction voltage and current transformers for wiring. Voltage and current transformers are fixed on the pallet, the pallet by lifting the support bar on the cover, and immersed in transformer oil. 3.5 high voltage feed-through, the second feed-through cover mounted on the fuel tank side with the drain plug grounding bolts. 3.6 meter box installed in the front of the tank, fitted with observation windows and seal the hole with. 3.7 complex variable ratio metering tank replacement ratio using the second duplex, facilitate the replacement ratio, more direct and efficient work 3.8 complex variable ratio measurement principle, the use of V / V-12 wiring, voltage loop secondary b-point ground , current loop secondary loop end of the AC phase currents to ground. In the complex variable ratio metering boxes inside, the current end of the secondary circuit, voltage secondary circuit end of the b-point, is connected to a point, but not the ground, then the actual meter measurement, the point (b) should be grounded 4. check before acceptance and use: 4.1 Visual inspection: product well sealed, no broken porcelain pieces, factory documents (certificates of compliance, instructions) are complete. 4.2 with a 2500-volt megger to ground insulation resistance, its value is not less than 1000MΩ. (Air humidity less than 75%) 4.3 Short-term frequency voltage test, the test voltage is 80% of factory test values. 4.4 Products by long-term placement, before use, subject to 5.1,5.2,5.3 bar examination. 4.5 should be checked before installation and computational load match, should be installed in accordance with the load value labels. 5. Use the methods and precautions: The 5.1 product such as for electricity metering branch lines or for line loss assessment it can be mounted on poles measuring box bracket. 5.2 for metering the high side of the power transformer, the transformer can be installed on the same platform or on a pole. 5.3 New installation and operation of the metering tank found that the phase sequence is reversed, there will still forward watt-hour meter, reactive power meter reversal, the result of measurement error meter should measure any two high side box to change position, metering boxes to positive phase sequence, in order to ensure accurate measurement measuring box. 5.4 product for the second phase of a power line to the metering degrees, should be engaged in the metering box B phase, and the remaining two phases in positive phase sequence of connections, preventing additional measurement error generated. You must use hanging on the tank when climbing 5.5 product lifting. 5.6 combined transformer secondary terminals and ground stud b point on the tank should be grounded, so as to avoid accidents 6, maintenance and custody: or add new oil. 6.2 metering tank before use properly kept in the warehouse, storage temperature of -25 ℃ to + 40 ℃, relative humidity less than 85%, ventilated, non-corrosive gases. 7, Ordering Information: When ordering this type of product, please provide details following items. Model 7.1; 7.2 Rated voltage; rated current ratio 7.3; accuracy class 7.4; 7.5 product environment; 7.6 single-phase or two-way metering metering